Typewriter stop mechanism



July 5, 1938. J KOCA 2,122,614

TYPEWRITER STOP MECHANISM Filed May 20, 1935 2 Sheets-Sheet 1 July 5,1938. F K A' 2,122,614

' TYPEWRITER STOP MECHANISM Filed May 20, 1935 2 Sheets-Sheet 2 Patented July 5, 1938 PATENT OFFICE TYPEWRITER STOP MECHANISM James- F. Koca, Woodstock, Ill.,

assignor to Woodstock Typewriter Company, Woodstock,

111., a corporation of Illinois Application May 20,

6 Claims.

This invention relates to typewriters and particularly to an attachment for typewriters.

More specifically, the invention relates to key controlled stop means for stopping'the move- "ment of the carriage at predetermined positions. An important object of the invention is the provision of new and improved stop mechanism adapted to be attached to existing typewriters or made a unitary part of newly manufactured lo'typewiters, and which is provided with means whereby a stop may be set in any position coextensive with a typewriter key, character or type bar to limit the movement of the carriage to the left when a key lever, such as a tabulator key lever, is depressed.

Another object of the invention is the provision of a new and improved key which is adapted to be set by the depression of a key lever into the path of a stop to' limit the movement of the *carriage when the escapement mechanism is released;

Numerous other objects and advantages will be apparent throughout the progress of the following specification.

The accompanying drawings illustrate a selected embodiment of the invention and the views therein are as follows:

Fig. l is a detail rear elevational view, partly in section, of a typewriter embodying the invention.

Fig. 2 is a detail end elevation, partly in section, of a typewriter embodying the invention.

Fig. 3 is a detail sectional view on the line 3-3 of Fig. 1.

Fig. 4 is a detail plan section on the line 4-4 of Fig. 2.

Fig. 5 is a detail sectional view showing the improved'stop in its normal inoperative, out of the way position.

Fig. 6 is a view similar to Fig.5 but showing the stop in its depressed or stop position,

Fig. 7 is a detail perspective view showing the parts of the stop.

The particular typewriter herein shown for the purpose ofillustration is that of the popular, well known Woodstock typewriter, although the invention is not confined to this particular make of typewriting machine. The typewriter or typewriting machine illustrated has a frame 1935, Serial No. 22,299 (01. 197-176) from rotation. A series of column stops 16 are journaled on the bar l4 and project rearwardly therefrom, as more clearly shown in Fig. 4. These column stops are arranged substantially throughout the entire length of the bar 4 and are spaced from one another by letter space distances.

Each column stop comprises a rigid metal piece I! having a hole |8 provided therein through which the bar I4 extends. The upper part of the piece I1 is cut out as indicated at I9 to provide a recess into which a spring clip 2|! is arranged. An upper piece 2| is formed in the form of an inverted U, or channel shaped, and includesside legs 22 and 23, Fig. '7. The side legs extend on opposite sides of the piece I1, and the upper piece or clip 2| fits over the top of the piece H and holds the spring 20 within the recess between the parts 24 and the top 25 of the clip 2|. The legs 22 and 23 are provided with legs 26 and 21, respectively, there being alined holes 28 and 29 provided in the legs to register with a hole 30 provided in the piece IL A rivet or other fastening element 3|, Fig. 5, passes through the holes in the legs and in the body of the member I1 and pivotally fixes the clip 2| to the body or piece H. The spring 20 urges the clip 2| upwardly with respect to the body I! in the position clearly shown in Fig. 5. The end 32 of the clip 2| extends a predetermined distance beyond the shoulder 33 and limits the pivotal movement of the clip 2| with respect to the body l1, and prevents the spring from falling out of its recess IS. The stops I6 are movable either in the up-- ward inoperative position, as shown in Fig. 5, or in the down, operable or stop position, as shown in Fig. 6. The upward and downward movement of the stop is limited, and lateral movement of a stop is prevented, because each stop is arranged in a. space 34 provided in a longitudinal bar 35 with which the stops co-operate. These stops are held in either of their adjusted positions by means of teeth 36 formed on the rear ends 32 of the clips of each stop, which teeth 38 are adapted to engage the opposite sides of a rib 31 formed on the bar I4. Due to the pivoted and yielding connection of the clip 2| with the body l1 and the stop, the stops are held in either of their adjusted positions. When a stop is moved from one position to the other, the teeth 36 will snap over the rib 31 and hold the stop in its new position. When the stops are in their lower position they will engage the bottom of the slots 34 with which the stops are always in registration. The bar 35 extends longitudinally of it in one direction.

tion, as clearly shown in Fig. 3.

base of the housing 41, 2.

7 housing 47.

the carriage at the rear of the bar it. This bar 35 is pivotally supported at each end by brackets 38 which are journaled on the bar l4 and secured to the bar 35 by means of screws 39. One

5 of the brackets 38 is provided with a. finger piece All by which the bracket may be oscillated on the shaft M to raise the bar 35. A stop pin ll is adapted to engage a projection or tongue 42, Fig. 3, to limit the movement of the finger piece A stop 43 fixed to a rigid part of the machine, Fig. 3, limits the movement of the finger piece in the other direction. A

coiled spring 44 engages the finger piece and urges the finger piece in a predetermined posi- When the finger piece 4b is operated, the bar 35 will be swung on its pivot and cause all the stops. l6, which are down in the position shown in Fig. 6, to be moved to the upper normal inoperative position, as

20 shown in Fig. 5. As soon as the finger piece 40,

is released, the spring M will return the bar to its normal position, as shown in Figs. 3 and 6.

A finger 45 is provided for selectively depressing the stops to their lower or operative positions.

25 This finger is best shown in Figs.'2, 5, and'6, 7

' and isrigidly connected to a bar 45, Fig; 2,'which is slid'able verticallyin a casing l'l rigidly fixed to the rear part of the machine. The end 48 of the lever 46 is guided in a slot -49 "formed in the A crank or arm 50 is pivotally connected at 5!, Fig. 2, to the rod 56, and this crank or arm is rigidly connected to a pin or stud shaft 52 which is pivotally rnounted in a bracket arm 53 rigidly connected to the A second arm 54 is rigidly fixed to the shaft 52 and is pivotally connected at 55 to the link 55 of a key lever 51. Thus, when the key lever 51 is operated by depressing the key 58, the link 56 will move to the right, Fig. 2, turn- 40 ing the shaft 52 in a counter-clockwise direction,

causing the arm 5i] to lower and thereby moving the bar 45 in a down position, "causing the finger 65 to move downwardly from the position shown in Fig. 5 to the position shown in. Fig. 6, 5 and thus depressing a stop shown in Fig. 6. The

bar 45 is furtherheld in proper operable position within the casing'fllby means of a pin 59 fixed to the casing, passing through a slot 60 formed in a part of the lever, as clearly shown in Fig. 2. A spring 6!, fastened to the rod 36 and to a rigid stud 62, normally urges the rod or lever 4tupwardly so that the rod will be seated in the bottom of the slot 60.

Therefore; when the tabulator key lever, not shown but which is conventional on Woodstock WYDGWIiDGI-S as well as typewriters of other makes, and the escapement mechanism is released, permitting the carriage to return to the' 5 10, 1933, to Otto A. Hokanson and James F.

'Koca, and assigned to the present assignee, may

be used.

A different type of stop means for guiding and operating the stop and a different type or finger W co-operating with the stop, and the manner in which the elements are. arranged in the casing, are disclosed and claimed in applicant's co-pending application Serial. No. 22,300, filed concurrently herewith.

In another. co-pending application, Serial No.

22,301, filed concurrently herewith, another means for operating stops is disclosed and. claimed.

The present invention provides novel means for controlling the stop, and the stop itself can be readily and quickly applied or removed due to the yieldable and pivoted construction of the parts which constitute the stop.

Changes may be made in the form, construction and arrangement or the parts without departing from the spirit of the invention or sacrificing any of its advantages, and the right is hereby reserved to make all such changes as fairly fall within the scope of the following claims.

The invention is hereby claimed as follows:

1. A typewriter tabulator mechanism comprisinga substantially round rod having a plurality of channels therein, a slotted bar held in. fixed juxtaposition to the rod, said bar having a slot corresponding to each letter-imprinting position on the typewriter, a stop member for each slot, said member comprising a body portion, a tooth portion and an extended arm portion and having a circular opening in the body portion adapted to embrace the rod whereby the stop member may be rotatably mounted on the rod, spring catch means pivotally mounted, on the stop member having its tooth portion adapted to reside in any of the channels on the rod thereby impeding the stop member resiliently at a fixed position in the course of its rotation about the rod, said catch also having releasing means extending along the upper edge 'of the extended arm portion of the stop member, and stop setting means adaptedto move the stop members out or" inoperative position into the respective slots, said means moving in a path during the traversal of which it first I encounters the catch-releasing member, releases having a catch portion adapted to engage said slot and a .depressible catch-releasing arm, a spring within the U-sh'aped member for urging said member in a predeterminedposition, and stop setting means having a path of motion during its active operation whereby it engages and depresses the catch releasing arm and thereupon impels the stop member into operative position in the slot.

3. In a typewriter, a shiftable carriage, a bar carried by the carriage, a slotted rod carried by the carriage, a stop on the bar and movable in a slot in the rod, a U-shaped member having a catch portion adapted to be positioned in said slot and having a dep-ressible catch releasing arm pivotally connected to the body of the stop and adjacent an edge thereof, a spring within the U-shaped member for urging said member into slot engaging position, and stop setting means having a path of motion during its active operation whereby it engages and depresses the catch releasing arm and thereupon impels the stop member into operative position in the slot.

4. Ina typewriter, a shiftable carriage, a bar carried by the carriage, a stop member rotatably adapted to engage in said grooves to rotatably position the stop member with respect to the bar, said catch member being resiliently mounted for normally resiliently urging the tooth portion into groove engaging position, an dstop setting means having a path of motion during its active operation for engaging the said projecting portion of the stop member and impelling the stop member into operative position, a portion of said catch member being arranged adjacent said projecting portion and in said path of motion, said portion of the catch member being actuated by the stop setting means during impelling of the stop member into operative position to release the tooth portion from the grooves.

5. In a typewriter, a shiftable carriage, a bar carried by the carriage, a stop member rotatably mounted on the bar and having a projecting portion, substantially longitudinally extending grooves on said bar, a catch member pivotally mounted on said stop member and having a tooth portion on one side of the pivot adapted to engage in said grooves to rotatably position the stop member with respect to the bar, spring means for normally resiliently urging the tooth portion into groove engaging position, and stop setting means having a path of motion during its active operation for engaging the said projecting portion of the stop member and impelling the stop member into operative position, a portion of said catch member on the other side of said pivot being arranged adjacent said projecting portion and in said path of motion, said other portion of said catch member being actuated by the stop setting means during impelling of the stop member into operative position to move the catch member and release the tooth portion from the grooves.

6. The combination with a typewriter having a column stop bar provided with a rib thereon and a slotted bar arranged in juxtaposition with respect to the column stop bar, of a column stop cooperating with both of said bars and comprising a member adapted to be received in a slot in the slotted bar, there being a hole provided in the member through which the column stop bar extends, a channel-shaped clip pivoted to the member and partly encasing the said member, means for limiting the pivoted movement of the channel-shaped clip with respect to the member, said clip having teeth engaging the rib on the column stop bar, said member having a cutout provided in the upper surface thereof, and a spring arranged in the cutout of the member and engaging the clip to urge the clip away from the metal member and the teeth of the clip against the column stop bar.

JAMES F. KOCA. 

